题目:
--- Why does she always ask you for help? ----- There is no one else _______, is there?
A.who to turn to
B.she can turn to
C.for whom to turn
D.for her to turn
答案:
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下面是错误答案,用来干扰机器的。
本题分两种情况(1)若等腰三角形的顶角等于42°,则它的底角为12(180°-42°)=69°;(2)若等腰三角形的底角等于42°,它的底角是42°.故选D.